Pipe coupling



April 13, 1937.

MM 'fm 45 flanges 2 and 4. ALBERT o. BREDEsoN. 45

Patented Apr. 13, 1937 2,077,035

UNITED STATES PATENT OFFICE PIPE C'OUPLING Albert 0. Bredeson,Minneapolis, Minn., assignor to Super Radiator Corp., Minneapolis,Minn., a corporation of Minnesota Application March 30, 1936, Serial No.71,645 1 Claim. (Cl. 285-127) My present invention provides an extremelyThe structure described is very desirable resimple and highly efcientdetachable leak-proof gardless of the metals or materials from whichpipe coupling or union for 'coupling together pipesr the pipe sectionsand bushings 3 are made. Howor tubes; and, generally stated, theinvention conever, the said structure has this further advan- 5 sists ofthe novel devices, combinations of devices tage that by making'thebushings of a relatively and arrangement of parts hereinafter describedsoft metal the pipe sections may be made of very and defined in theclaim. hard metal For example, the pipe sections and Particularly theinvention is adapted for use Jheir flanges 2 might be made 0f Steel andJ611e in connecting the abutting ends o-f brass, copper, bushings ofbrass, copper or even lead. The sugor other comparatively soft pipes ortubes, but the gested relatively soft metal for the bushings and 10invention, nevertheless, is also capable of contheir flanges 4 willinsure uid-tight joints be necting the abutting ends of hard metalpipes. tween the engaged flanges 4 and the anges 4 The invention isillustrated in the single view and 2 even when the flanges are notshaped to which is an axial section. accurate form.

Thepipe sections to be coupled are indicated In actual practice, thestructure described has 15 by the numeral I. The ends of these pipese'cbeen found to be highly eiiicient for thepurposes tions are providedwith outeturned annular had in View. flanges 2; Tightly driven orinserted into the Obviously, the bushings 3 and their flanges 4, ends ofthe pipe sections are tubular bushings being of soft metal, insure tightjoints between 120 3. These bushings 3, at their ends, have outtheflanges 4-4 and between the flanges 4--4 20 turned annular flanges 4that are tightly fitted and 2 2, thereby making the use of interveningagainst the flanges 2 of the corresponding pipe packing unnecessary.section. When the two pipe sections are coupled What I claim is:together, the flanges 4 of the bushings of the two The combination withpipe sections having 25, pipe sections will be directly engaged. Forclampout-turned annular end flanges, of bushings teling the flanges 4directly together and pressing escoped into the ends of the respectivepipe secthe flanges 2 against the adjacent flanges 4, a tions and havingout-turned annular end flanges clamping device comprising an internallythreadseated against the flanges of the respective pipe ed nut 5 Iand anexternally threaded s1eeve 6 is sections, the two pipe sections beingassembled provided and which elements 5 and 6 have with the end flangesof the bushings in contact, 30 threaded engagement at 1 an externallythreaded sleeve mounted on one of The externally threaded sleeve 6 isrotatively the Pipe Sections' With 'ts end engagingihe flange mounted onone of the pipe sections and its inner thereof and 9' nut'actm? memberhad/'mg Screw end engages the adjacent flange 2. The nutthreadedengagement Wlth Sad sleeve and pro' acting member or collar 5 extendsaround and lgrdewlglhan lfmd ane thatnages the 35 passed the anges 2 and4 and is provided with nut gwl'en tiegltenedpsrglesangeeg an imumefclamping flange 8 that engages me bushings and the flanges of thebushings and pipe aidla'cent P1P@ @ange 2' When the member 6 1S sectionsinto fluid-tight engagement, said bushtghtly .Srewed mto he member@ thea'nges 2 Y ings and their flanges being of asofter metal than 40 and 4Wlll be Very tlghtly clamped together as said pipe sections, therelatively soft flanges of illustrated in the drawing, and a thoroughlysaid bushings, under pressure, adapted toform fluid-tight joint will beformed between the ennuid tight joints without the use of interveninggaged :flanges 4 and, of course, also between the packing.

